Microsoft recommends trying either of these two workarounds to resolve the issue:

Export your mail and/or contacts from Windows Live Mail or Outlook Express using another computer that has a 32-bit version of Outlook installed. Transfer the resulting .pst file to the Outlook 2013 64-bit version.

Uninstall Office 2013 64-bit and install a 32-bit version of Office 2013, which reads files transferred from Outlook Express or Windows Live Mail.